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Silver 3.5-inch internal hard drive with exposed circuit board and label showing 18TB capacity

Toshiba

Toshiba X300 Pro HDWR51JXZSTB 18TB 7200 RPM 512MB SATA 3.5" internal hard drive

SKU CH-57G6-D89PJ MPN HDWR51JXZSTB

High-capacity 18 TB desktop drive with 7200 RPM speed and 512 MB cache for demanding creative and gaming workloads

  • Total capacity18 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Recording methodCMR
  • Rotational speed7,200 RPM
  • Cache memory512 MB
  • Massive 18 TB capacity stores large media libraries and project files
  • 7200 RPM rotational speed accelerates data access for demanding workloads
  • 512 MB cache buffer reduces latency during intensive read and write operations
  • 300 TB per year workload rating supports sustained high-intensity use
  • 0 million hours MTTF rating indicates long-term reliability

18 TB CMR desktop drive

The Toshiba X300 Pro HDWR51JXZSTB is an 18 TB 3.5 inch internal hard drive built for high-end workstations and multimedia systems. It uses CMR recording technology and a SATA 6.0Gb/s interface to deliver consistent throughput for demanding creative and gaming workloads.

18 TB capacity with 300 TB per year workload rating

The drive provides 18 TB of storage space and is rated for workloads up to 300 TB per year with an MTTF of 1.0 million hours. A 7200 RPM spindle speed and 512 MB cache shorten response times for large media files, while the SATA 6.0Gb/s link sets the maximum sustained transfer ceiling.

26.1 mm height fits standard 3.5 inch bays

At 26.10 mm high, 101.85 mm wide and 147.00 mm long, the drive fits standard desktop drive bays and mounting points. The SATA data and power connectors face the rear for straightforward cabling in typical chassis layouts. Retail or OEM packing may vary.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $383.99
Pricier than about 89% of the 4,938 comparable items (median $107.99).
Total capacity 18 TB
Higher than about 93% of the 2,372 comparable items (median 2 TB).
Price per TB $21.33 per TB
Cheaper than about 92% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameTOSHIBA
Product lineX300 Pro
Model nameHDWR51JXZSTB
Total capacity18 TB
Recommended useGaming Hard Drives
Performance
Rotational speed7,200 RPM
Storage
Recording methodCMR
Cache memory512 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight0.77 kg
Package size192 × 140 × 62 mm

Questions about this item

Will the 18TB SATA 6.0Gb/s interface work with my older motherboard that only has SATA 3Gb/s ports?

The drive is backward compatible with SATA 3Gb/s ports and will operate at the slower 3Gb/s link speed without any configuration changes.

How can I confirm the 7200 RPM spindle speed and 512MB cache are active after installation?

Use a tool such as CrystalDiskInfo or the BIOS drive information page; both will report the rotational speed as 7200 RPM and the cache size as 512 MB.

Does the retail box include a SATA data cable and mounting screws, or must I buy them separately?

The drive is sold as a bare unit; a SATA data cable and 3.5" mounting screws are not included and must be purchased separately.

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